High-speed quantitative 3D imaging by dual-illumination holographic microscopy

Area of Science:

• Biomedical Optics
• Holographic Imaging
• Microfluidics

Background:

• Traditional blood flow imaging (BFI) methods can be invasive and require time-consuming analysis.
• Developing non-invasive, efficient techniques for visualizing microvascular dynamics is crucial for biological research.

Purpose of the Study:

• To introduce a new digital holography technique for blood flow imaging (BFI) using dual illumination.
• To enhance the resolution and ease of sample manipulation in holographic blood flow visualization.
• To enable simultaneous phase-shifting reconstruction for future live 3D holographic imaging.

Main Methods:

• Utilized digital holography with two microscope objective lenses and a 90° angle between illumination beams.
• Implemented a setup allowing for wider angular rotation and good z-resolution.
• Developed a system enabling easier sample displacement in multiple directions.

Main Results:

• Achieved simultaneous phase-shifting reconstruction for both illumination beams.
• Demonstrated effective blood flow imaging of red blood cells (RBCs) in zebrafish larvae.
• Validated the technique's effectiveness and potential for live 3D holographic applications.

Conclusions:

• The proposed dual-illumination digital holography technique provides an effective, non-invasive method for blood flow imaging.
• The setup facilitates improved imaging capabilities and sample handling compared to existing methods.
• This technique shows significant promise for advancing in-vivo microcirculation studies and live 3D holographic imaging.